US3207738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization method
Assignee: Shell USA Inc
•
Filing: 1961-12-20
•
Granted: 1965-09-21
•
Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Pieter W O Wijga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:49
CPC Classifications
C; C11; C11D; C11D10/00; C11D10/04; C11D10/045; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092; C11D1/00; C11D1/66; C11D1/755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE METHOD OF CRYSTALLIZING A CRYSTALLIZABLE POLYOLEFIN WHICH COMPRISES (A) PRODUCING A MELT OF (A) A NORMALLY SOLID, CRYSTALLIZABLE POLYMER OF AN ALPHA-MONOOLEFIN OF 2 TO 8 CARBON ATOMS PER MOLECULE CONTAINING AT LEAST TRACES OF THE RESIDUE OF A ZIEGLER POLYMERIZATION CATALYST, AND (B) AN EFFECTIVE AMOUNT, IN THE RANGE FROM 0.01 TO 5 PERCENT BY WEIGHT, OF A CRYSTALLIZATION MODIFYING TERMINAL ALIPHATIC MONOCARBOXYLIC ACID SUBSTITUTED WITH AT LEAST ONE CARBOCYCLIC GROUP PER MOLECULE, (B) AND SOLIDIFY SAID MELT BY COOLING IT.
Claim 2
Independent Claim
83 words
THE METHOD OF CRYSTALLIZING A CRYSTALLIZABLE POLYOLEFIN WHICH COMPRISES (A) PRODUCING A MELT OF (A) A NORMALLY SOLID, CRYSTALLIZABLE POLYMER OF AN ALPHA-MONOOLEFIN OF 2 TO 8 CARBON ATOMS PER MOLECULE CONTAINING AT LEAST TRACES OF THE RESIDUE OF A ZIEGLER POLYMERIZATION CATALYST, AND (B) AN EFFECTIVE AMOUNT, IN THE RANGE FROM 0.01 TO 5 PERCENT BY WEIGHT, OF A CRYSTALLIZATION MODIFYING TERMINAL ALIPHATIC MONOCARBOXYLIC ACID SUBSTITUTED WITH AT LEAST ONE CARBOCYCLIC GROUP PER MOLECULE, (B) AND SOLIDIFY SAID MELT BY COOLING IT.
References Cited (Backward Citations)
US2978442A
Cited
US3028363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |